Specifications
Engine, A.J.S. Design and Manufacture. Inclined Single Cylinder. Side-by-Side Valves. (84 x 90 m.m. Bore and Stroke, 498 c.c. capacity). Improved System of Mechanical Lubrication. Detachable Cylinder Head. Aluminium Piston. Roller Bearings to Big End of Connecting Rod. Ball Bearing Main Shafts.
Frame, Semi-cradle, with Duplex Chainstays.
Three-Speed Countershaft Gear, Ratios, "Light," 4.81, 7.06 and 12.85 to 1; "Heavy," 4.77, 7.0 and 12.74 to 1.
Clutch, Hand-controlled.
Footstarter, with enclosed operating mechanism.
Rear Wheel, A.J.S. Patent Quick Detachable.
Tyres, 26"x3.25" Wired-on Avon Heavy Non-skid Rear Mudguard, Hinged.
Hubs, Taper Roller Bearing.
Carburettor, Amal, with twist grip control.
Handlebars, New Type with Steering Damper.
Footrests, adjustable to any position.
Brakes, Internal Expanding Front and Rear, quick adjustable.
Transmission, All Chain (Hans Renold) "Light." Front and Rear, ½in. pitch, .305 width; "Heavy." Front, ½in. pitch,. 305 width, Rear, 5/8in. pitch, 3/8 in. width. Primary Drive enclosed. Rear Drive. the top half only is covered.
Shock Absorber, on Engine Shaft.
Saddle, adjustable.
Magneto, Lucas, mounted behind Engine. Stand, Central, Spring-up.
Rear Carrier, Detachable.
Tools, complete kit.
Wheel Base, "Light," 54¾ in.; "Heavy" 56¾ in.
Petrol Tank, capacity, "Light," 2 gallons; "Heavy," 2¾ gallons.
Oil Tank, capacity, "Light," 4½ pints; "Heavy," 4½ pints.
Weight, to standard specification- "Light" 293 lbs; "Heavy" 308 lbs.
Extra for Lucas Magdyno Electric Lighting Set with Instrument Panel, as illustrated,
Extra for Lucas Magdyno Electric Lighting Set, without Instrument Panel,
This machine can be had in Two Models, viz., S9 "Light," and S9 "Heavy
Source: AJS Factory Catalogue 1931
